From 053b8539f46a81fb4b11f69e22dabe492ec98f90 Mon Sep 17 00:00:00 2001 From: sof Date: Mon, 29 Jun 1998 14:13:17 +0000 Subject: [PATCH] [project @ 1998-06-29 14:13:14 by sof] Added basic library for computing MD5 message digests --- ghc/lib/misc/MD5.lhs | 51 ++++++++++ ghc/lib/misc/cbits/md5.c | 243 ++++++++++++++++++++++++++++++++++++++++++++++ ghc/lib/misc/cbits/md5.h | 24 +++++ 3 files changed, 318 insertions(+) create mode 100644 ghc/lib/misc/MD5.lhs create mode 100644 ghc/lib/misc/cbits/md5.c create mode 100644 ghc/lib/misc/cbits/md5.h diff --git a/ghc/lib/misc/MD5.lhs b/ghc/lib/misc/MD5.lhs new file mode 100644 index 0000000..5ddebe1 --- /dev/null +++ b/ghc/lib/misc/MD5.lhs @@ -0,0 +1,51 @@ +% +% (c) The GRASP/AQUA Project, Glasgow University, 1998 +% +\section[md5]{MD5: Message-digest} + +This module provides basic MD5 support for Haskell, using +Colin Plumb's C implementation of MD5 to do the Hard Work. + +\begin{code} +{-# OPTIONS -#include "cbits/md5.h" #-} +module MD5 + ( + digest -- :: String -> IO String + , digestPS -- :: PackedString -> IO (ByteArray Int) + ) where + + +import GlaExts +import Addr +import PackedString + +\end{code} + +\begin{code} +digest :: String -> IO String +digest str = do + ps <- stToIO (packStringST str) + ba <- digestPS ps + let (ByteArray _ ba#) = ba + baToString ba# 16# 0# + where + baToString ba# n# i# + | n# ==# 0# = return [] + | otherwise = do + let ch# = indexCharArray# ba# i# + ls <- baToString ba# (n# -# 1#) (i# +# 1#) + return ((C# ch#):ls) + +digestPS :: PackedString -> IO (ByteArray Int) +digestPS ps = do + ctxt <- stToIO (newCharArray (0::Int,``sizeof(struct MD5Context)''::Int)) + let len = lengthPS ps + _ccall_ MD5Init ctxt + (if isCString ps + then _ccall_ MD5Update ctxt (psToCString ps) len + else _ccall_ MD5Update ctxt (psToByteArray ps) len) + dig <- stToIO (newCharArray (0::Int,16*(``sizeof(unsigned char)''::Int))) + _ccall_ MD5Final dig ctxt + stToIO (unsafeFreezeByteArray dig) + +\end{code} diff --git a/ghc/lib/misc/cbits/md5.c b/ghc/lib/misc/cbits/md5.c new file mode 100644 index 0000000..0606846 --- /dev/null +++ b/ghc/lib/misc/cbits/md5.c @@ -0,0 +1,243 @@ +/* + * This code implements the MD5 message-digest algorithm. + * The algorithm is due to Ron Rivest. This code was + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + * + * To compute the message digest of a chunk of bytes, declare an + * MD5Context structure, pass it to MD5Init, call MD5Update as + * needed on buffers full of bytes, and then call MD5Final, which + * will fill a supplied 16-byte array with the digest. + */ + +typedef unsigned long word32; +typedef unsigned char byte; + +struct MD5Context { + word32 buf[4]; + word32 bytes[2]; + word32 in[16]; +}; + +void MD5Init(struct MD5Context *context); +void MD5Update(struct MD5Context *context, byte const *buf, int len); +void MD5Final(byte digest[16], struct MD5Context *context); +void MD5Transform(word32 buf[4], word32 const in[16]); + + +/* + * Shuffle the bytes into little-endian order within words, as per the + * MD5 spec. Note: this code works regardless of the byte order. + */ +void +byteSwap(word32 *buf, unsigned words) +{ + byte *p = (byte *)buf; + + do { + *buf++ = (word32)((unsigned)p[3] << 8 | p[2]) << 16 | + ((unsigned)p[1] << 8 | p[0]); + p += 4; + } while (--words); +} + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +void +MD5Init(struct MD5Context *ctx) +{ + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bytes[0] = 0; + ctx->bytes[1] = 0; +} + +/* + * Update context to reflect the concatenation of another buffer full + * of bytes. + */ +void +MD5Update(struct MD5Context *ctx, byte const *buf, int len) +{ + word32 t; + + /* Update byte count */ + + t = ctx->bytes[0]; + if ((ctx->bytes[0] = t + len) < t) + ctx->bytes[1]++; /* Carry from low to high */ + + t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */ + if ((unsigned)t > len) { + bcopy(buf, (byte *)ctx->in + 64 - (unsigned)t, len); + return; + } + /* First chunk is an odd size */ + bcopy(buf,(byte *)ctx->in + 64 - (unsigned)t, (unsigned)t); + byteSwap(ctx->in, 16); + MD5Transform(ctx->buf, ctx->in); + buf += (unsigned)t; + len -= (unsigned)t; + + /* Process data in 64-byte chunks */ + while (len >= 64) { + bcopy(buf, ctx->in, 64); + byteSwap(ctx->in, 16); + MD5Transform(ctx->buf, ctx->in); + buf += 64; + len -= 64; + } + + /* Handle any remaining bytes of data. */ + bcopy(buf, ctx->in, len); +} + +/* + * Final wrapup - pad to 64-byte boundary with the bit pattern + * 1 0* (64-bit count of bits processed, MSB-first) + */ +void +MD5Final(byte digest[16], struct MD5Context *ctx) +{ + int count = (int)(ctx->bytes[0] & 0x3f); /* Bytes in ctx->in */ + byte *p = (byte *)ctx->in + count; /* First unused byte */ + + /* Set the first char of padding to 0x80. There is always room. */ + *p++ = 0x80; + + /* Bytes of padding needed to make 56 bytes (-8..55) */ + count = 56 - 1 - count; + + if (count < 0) { /* Padding forces an extra block */ + bzero(p, count+8); + byteSwap(ctx->in, 16); + MD5Transform(ctx->buf, ctx->in); + p = (byte *)ctx->in; + count = 56; + } + bzero(p, count+8); + byteSwap(ctx->in, 14); + + /* Append length in bits and transform */ + ctx->in[14] = ctx->bytes[0] << 3; + ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29; + MD5Transform(ctx->buf, ctx->in); + + byteSwap(ctx->buf, 4); + bcopy(ctx->buf, digest, 16); + bzero(ctx,sizeof(ctx)); +} + + +/* The four core functions - F1 is optimized somewhat */ + +/* #define F1(x, y, z) (x & y | ~x & z) */ +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +/* This is the central step in the MD5 algorithm. */ +#define MD5STEP(f,w,x,y,z,in,s) \ + (w += f(x,y,z) + in, w = (w<>(32-s)) + x) + +/* + * The core of the MD5 algorithm, this alters an existing MD5 hash to + * reflect the addition of 16 longwords of new data. MD5Update blocks + * the data and converts bytes into longwords for this routine. + */ + +void +MD5Transform(word32 buf[4], word32 const in[16]) +{ + register word32 a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} + diff --git a/ghc/lib/misc/cbits/md5.h b/ghc/lib/misc/cbits/md5.h new file mode 100644 index 0000000..ff671be --- /dev/null +++ b/ghc/lib/misc/cbits/md5.h @@ -0,0 +1,24 @@ +/* MD5 message digest */ +#ifndef _MD5_H +#define _MD5_H + +typedef unsigned long word32; +typedef unsigned char byte; + +struct MD5Context { + word32 buf[4]; + word32 bytes[2]; + word32 in[16]; +}; + +void MD5Init(StgByteArray context); +/*ORIG: void MD5Init(struct MD5Context *context);*/ +void MD5Update(StgByteArray context, void *buf, int len); +/*ORIG: void MD5Update(struct MD5Context *context, byte const *buf, int len); */ +void MD5Final(StgByteArray digest, StgByteArray context); +/*ORIG: void MD5Final(byte digest[16], struct MD5Context *context);*/ + +#endif /* _MD5_H */ + + + -- 1.7.10.4